Acetone pressurized condensation adsorption type acetone recovery system and recovery method

Abstract

The invention discloses an acetone pressurized condensation adsorption type acetone recovery system and a recovery method. The system comprises an acetone gas compression device, a refrigeration device, an adsorption device, an acetone liquid storage tank and an enriching gas circulation pipeline. Through the acetone gas compression device, acetone waste gas is compressed into a medium-pressure state; then, the acetone waste gas enters an evaporator of the refrigeration device for cooling and liquification; after the liquification, the acetone waste gas enters an acetone liquid storage tank to achieve the goal of recovery; unliquefied gas maintains the medium-pressure state to enter the adsorption device, and is adsorbed in the medium-pressure state; after the adsorption saturation, the pressure is reduced to the normal pressure for desorption; enriched acetone gas obtained through desorption is conveyed back into the acetone gas compression device for cyclic recovery. Compared with the prior art, the system and the method provided by the invention have the advantages that the final-stage evaporation temperature of the refrigeration device is greatly raised; the structure of the refrigeration device is simplified; meanwhile, the adsorption device omits a vacuum pump desorption mode with higher fault rate, in addition, the desorption efficiency is greatly improved, the enriched gas after the normal-pressure desorption returns to the condensing front end to be cyclically recovered, and the recovery efficiency is improved.

Description

technical field [0001] The invention relates to an acetone pressurized condensation adsorption type acetone recovery system and a recovery method used in the polyurethane adhesive shoemaking industry, and belongs to the technical field of acetone gas recovery. Background technique [0002] Volatile organic compounds (VOCs) in the shoe industry mainly come from the use of solvent-containing products such as shoe adhesives and treatment agents, and are mainly concentrated in the middle of the molding process. Water-based adhesives can significantly reduce the content of VOCs, but the penetration rate is low. The commonly used oil-based adhesives are the main source of VOCs in the shoe industry. For example, polyurethane adhesives use a large amount of acetone, resulting in a large amount of organic waste emissions such as acetone. Commonly used acetone treatment methods mainly include: catalytic oxidation method, adsorption method, membrane separation method, condensation meth...

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: Aiming at the problems of low equipment energy efficiency, high operating cost and high failure rate of the normal pressure condensation + adsorption acetone recovery system commonly used in the polyurethane adhesive shoemaking industry, the present invention proposes a new type of acetone pressurized condensation adsorption acetone Recovery systems and recovery methods to reduce refrigeration requirements and operating costs, and to increase system operating efficiency and reliability

Images